Sailor Moon 3: Slim City

In the third episode of Sailor Moon, Serena and her pals are all convinced they are fat and must diet and exercise.

You start out at Serena's house, where she is crying because she gained a half pound. At Crossroads Junior High, Serena and her 3 friends see that Miss Haruna has been working out, and Melvin has pictures of her. All four friends decide they must work out too. It turns out Jedite has plans to use the 'vanity energy' of earthlings for his evil Queen.

Jedite poses as the head of the exercise building and shows them in, then forces them to exercise tirelessly. Soon he puts them into "relaxation pods" which are really energy sappers.

Serena collapses against Andrew, the blonde arcade guy, as she walks down the street. Andrew tells her to start taking better care of herself and takes her out to dinner. She then gets a big bag of donuts to stuff herself with. Darian, the dark-haired guy that has been teasing her, jokes about her donut-eating and she throws one at him.

Luna tells Serena she has no discipline or self control, and Serena throws herself back into extreme exercise again. She sees the teacher in a trance, and Luna goes down and sees the pod. Luna threatens Serena fiercely and drags her down to see the pods, as Sailor Moon. Sailor fights the muscle-bound trainers and runs away - but is reminded that Miss H needs her help. She uses her tiara and the trainers all go back to normal.

Jedite is scared off by Tuxedo Mask and everybody is happy again. As a joke at the end, Serena's brother rigs the scale to show she's 300 pounds.